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It resolves the session, calls ",[515,685,520],{},", captures timing into ",[515,688,689],{},"auth.resolvedIn",", fires lifecycle hooks, and silently catches errors so session resolution never breaks a request.",[692,693,316],"h2",{"id":694},"options",[512,696,697,698,705],{},"Inherits all ",[699,700,702,704],"a",{"href":701},"\u002Fuse-cases\u002Fbetter-auth\u002Fidentify-user#options",[515,703,520],{}," options",", plus:",[707,708,709,728],"table",{},[710,711,712],"thead",{},[713,714,715,719,722,725],"tr",{},[716,717,718],"th",{},"Option",[716,720,721],{},"Type",[716,723,724],{},"Default",[716,726,727],{},"Description",[729,730,731,752,771,790],"tbody",{},[713,732,733,739,744,749],{},[734,735,736],"td",{},[515,737,738],{},"exclude",[734,740,741],{},[515,742,743],{},"string[]",[734,745,746],{},[515,747,748],{},"['\u002Fapi\u002Fauth\u002F**']",[734,750,751],{},"Route patterns to skip (glob).",[713,753,754,759,763,768],{},[734,755,756],{},[515,757,758],{},"include",[734,760,761],{},[515,762,743],{},[734,764,765],{},[515,766,767],{},"undefined",[734,769,770],{},"If set, only matching routes are resolved.",[713,772,773,778,783,787],{},[734,774,775],{},[515,776,777],{},"onIdentify",[734,779,780],{},[515,781,782],{},"(log, session) => void",[734,784,785],{},[515,786,767],{},[734,788,789],{},"Called after successful identification.",[713,791,792,797,802,806],{},[734,793,794],{},[515,795,796],{},"onAnonymous",[734,798,799],{},[515,800,801],{},"(log) => void",[734,803,804],{},[515,805,767],{},[734,807,808],{},"Called when no session is found.",[692,810,812],{"id":811},"route-filtering","Route Filtering",[512,814,815],{},"Skip Better Auth's own routes and any public endpoints to avoid wasted database queries:",[523,817,819],{"className":525,"code":818,"language":528,"meta":529,"style":529},"const identify = createAuthMiddleware(auth, {\n  exclude: [\n    '\u002Fapi\u002Fauth\u002F**',     \u002F\u002F Better Auth itself\n    '\u002Fapi\u002Fpublic\u002F**',   \u002F\u002F Public endpoints\n    '\u002Fapi\u002Fhealth',      \u002F\u002F Health checks\n  ],\n})\n",[515,820,821,837,846,861,874,888,895],{"__ignoreMap":529},[533,822,823,825,827,829,831,833,835],{"class":535,"line":536},[533,824,578],{"class":577},[533,826,581],{"class":547},[533,828,584],{"class":543},[533,830,548],{"class":587},[533,832,590],{"class":547},[533,834,593],{"class":543},[533,836,596],{"class":543},[533,838,839,841,843],{"class":535,"line":567},[533,840,603],{"class":602},[533,842,606],{"class":543},[533,844,845],{"class":547}," [\n",[533,847,848,851,853,855,857],{"class":535,"line":574},[533,849,850],{"class":543},"    '",[533,852,615],{"class":560},[533,854,612],{"class":543},[533,856,593],{"class":543},[533,858,860],{"class":859},"sHwdD","     \u002F\u002F Better Auth itself\n",[533,862,863,865,867,869,871],{"class":535,"line":599},[533,864,850],{"class":543},[533,866,624],{"class":560},[533,868,612],{"class":543},[533,870,593],{"class":543},[533,872,873],{"class":859},"   \u002F\u002F Public endpoints\n",[533,875,876,878,881,883,885],{"class":535,"line":635},[533,877,850],{"class":543},[533,879,880],{"class":560},"\u002Fapi\u002Fhealth",[533,882,612],{"class":543},[533,884,593],{"class":543},[533,886,887],{"class":859},"      \u002F\u002F Health checks\n",[533,889,890,893],{"class":535,"line":656},[533,891,892],{"class":547},"  ]",[533,894,632],{"class":543},[533,896,897,899],{"class":535,"line":670},[533,898,673],{"class":543},[533,900,676],{"class":547},[512,902,903],{},"For high-traffic apps, flip the model — only resolve sessions on routes that need them:",[523,905,907],{"className":525,"code":906,"language":528,"meta":529,"style":529},"const identify = createAuthMiddleware(auth, {\n  include: ['\u002Fapi\u002Fdashboard\u002F**', '\u002Fapi\u002Faccount\u002F**'],\n})\n",[515,908,909,925,953],{"__ignoreMap":529},[533,910,911,913,915,917,919,921,923],{"class":535,"line":536},[533,912,578],{"class":577},[533,914,581],{"class":547},[533,916,584],{"class":543},[533,918,548],{"class":587},[533,920,590],{"class":547},[533,922,593],{"class":543},[533,924,596],{"class":543},[533,926,927,929,931,933,935,938,940,942,944,947,949,951],{"class":535,"line":567},[533,928,638],{"class":602},[533,930,606],{"class":543},[533,932,609],{"class":547},[533,934,612],{"class":543},[533,936,937],{"class":560},"\u002Fapi\u002Fdashboard\u002F**",[533,939,612],{"class":543},[533,941,593],{"class":543},[533,943,557],{"class":543},[533,945,946],{"class":560},"\u002Fapi\u002Faccount\u002F**",[533,948,612],{"class":543},[533,950,629],{"class":547},[533,952,632],{"class":543},[533,954,955,957],{"class":535,"line":574},[533,956,673],{"class":543},[533,958,676],{"class":547},[512,960,961,963,964,966,967,970,971,974,975,977,978,980],{},[515,962,758],{}," and ",[515,965,738],{}," use glob patterns (",[515,968,969],{},"*",", ",[515,972,973],{},"**","). Provide both if you need granular control — ",[515,976,738],{}," wins over ",[515,979,758],{},".",[692,982,984],{"id":983},"lifecycle-hooks","Lifecycle Hooks",[512,986,987,988,990],{},"Use ",[515,989,777],{}," to react to user identification — for example, force-keep logs for premium users via tail sampling:",[523,992,994],{"className":525,"code":993,"filename":527,"language":528,"meta":529,"style":529},"const identify = createAuthMiddleware(auth, {\n  onIdentify: (log, session) => {\n    if (session.user.plan === 'enterprise') {\n      log.set({ _forceKeep: true })\n    }\n  },\n  onAnonymous: (log) => {\n    log.set({ anonymous: true })\n  },\n})\n",[515,995,996,1012,1039,1075,1102,1107,1112,1129,1154,1159],{"__ignoreMap":529},[533,997,998,1000,1002,1004,1006,1008,1010],{"class":535,"line":536},[533,999,578],{"class":577},[533,1001,581],{"class":547},[533,1003,584],{"class":543},[533,1005,548],{"class":587},[533,1007,590],{"class":547},[533,1009,593],{"class":543},[533,1011,596],{"class":543},[533,1013,1014,1017,1019,1022,1026,1028,1031,1034,1037],{"class":535,"line":567},[533,1015,1016],{"class":587},"  onIdentify",[533,1018,606],{"class":543},[533,1020,1021],{"class":543}," (",[533,1023,1025],{"class":1024},"sHdIc","log",[533,1027,593],{"class":543},[533,1029,1030],{"class":1024}," session",[533,1032,1033],{"class":543},")",[533,1035,1036],{"class":577}," =>",[533,1038,596],{"class":543},[533,1040,1041,1044,1046,1049,1051,1054,1056,1059,1062,1064,1067,1069,1072],{"class":535,"line":574},[533,1042,1043],{"class":539},"    if",[533,1045,1021],{"class":602},[533,1047,1048],{"class":547},"session",[533,1050,980],{"class":543},[533,1052,1053],{"class":547},"user",[533,1055,980],{"class":543},[533,1057,1058],{"class":547},"plan",[533,1060,1061],{"class":543}," ===",[533,1063,557],{"class":543},[533,1065,1066],{"class":560},"enterprise",[533,1068,612],{"class":543},[533,1070,1071],{"class":602},") ",[533,1073,1074],{"class":543},"{\n",[533,1076,1077,1080,1082,1085,1088,1091,1094,1096,1098,1100],{"class":535,"line":599},[533,1078,1079],{"class":547},"      log",[533,1081,980],{"class":543},[533,1083,1084],{"class":587},"set",[533,1086,1087],{"class":602},"(",[533,1089,1090],{"class":543},"{",[533,1092,1093],{"class":602}," _forceKeep",[533,1095,606],{"class":543},[533,1097,665],{"class":664},[533,1099,551],{"class":543},[533,1101,676],{"class":602},[533,1103,1104],{"class":535,"line":635},[533,1105,1106],{"class":543},"    }\n",[533,1108,1109],{"class":535,"line":656},[533,1110,1111],{"class":543},"  },\n",[533,1113,1114,1117,1119,1121,1123,1125,1127],{"class":535,"line":670},[533,1115,1116],{"class":587},"  onAnonymous",[533,1118,606],{"class":543},[533,1120,1021],{"class":543},[533,1122,1025],{"class":1024},[533,1124,1033],{"class":543},[533,1126,1036],{"class":577},[533,1128,596],{"class":543},[533,1130,1132,1135,1137,1139,1141,1143,1146,1148,1150,1152],{"class":535,"line":1131},8,[533,1133,1134],{"class":547},"    log",[533,1136,980],{"class":543},[533,1138,1084],{"class":587},[533,1140,1087],{"class":602},[533,1142,1090],{"class":543},[533,1144,1145],{"class":602}," anonymous",[533,1147,606],{"class":543},[533,1149,665],{"class":664},[533,1151,551],{"class":543},[533,1153,676],{"class":602},[533,1155,1157],{"class":535,"line":1156},9,[533,1158,1111],{"class":543},[533,1160,1162,1164],{"class":535,"line":1161},10,[533,1163,673],{"class":543},[533,1165,676],{"class":547},[512,1167,1168,1169,1171,1172,1174,1175,1177],{},"Hooks fire after the session is resolved and ",[515,1170,520],{}," has set its fields. They run on every request that passes the ",[515,1173,758],{},"\u002F",[515,1176,738],{}," filter, so keep them fast and side-effect-free.",[1179,1180,1181,1186],"tip",{},[512,1182,1183,1184,606],{},"Common patterns for ",[515,1185,777],{},[1187,1188,1189,1193,1196],"ul",{},[1190,1191,1192],"li",{},"Force-keep audit logs for admins or high-value plans.",[1190,1194,1195],{},"Tag the request with feature flags or tenant info loaded from the session.",[1190,1197,1198],{},"Increment a per-user counter for billing.",[692,1200,1202],{"id":1201},"error-handling","Error Handling",[512,1204,1205,1206,1209,1210,963,1212,1215],{},"The middleware catches every error from ",[515,1207,1208],{},"getSession"," and logs nothing — your request keeps flowing whether the auth backend is up or down. The wide event still includes ",[515,1211,689],{},[515,1213,1214],{},"auth.identified: false"," so you can alert on session resolution health from your dashboards.",[1217,1218,1219],"style",{},"html pre.shiki code .s7zQu, html code.shiki .s7zQu{--shiki-light:#39ADB5;--shiki-light-font-style:italic;--shiki-default:#89DDFF;--shiki-default-font-style:italic;--shiki-dark:#89DDFF;--shiki-dark-font-style:italic}html pre.shiki code .sMK4o, html code.shiki .sMK4o{--shiki-light:#39ADB5;--shiki-default:#89DDFF;--shiki-dark:#89DDFF}html pre.shiki code .sTEyZ, html code.shiki .sTEyZ{--shiki-light:#90A4AE;--shiki-default:#EEFFFF;--shiki-dark:#BABED8}html pre.shiki code .sfazB, html code.shiki .sfazB{--shiki-light:#91B859;--shiki-default:#C3E88D;--shiki-dark:#C3E88D}html pre.shiki code .spNyl, html code.shiki .spNyl{--shiki-light:#9C3EDA;--shiki-default:#C792EA;--shiki-dark:#C792EA}html pre.shiki code .s2Zo4, html code.shiki .s2Zo4{--shiki-light:#6182B8;--shiki-default:#82AAFF;--shiki-dark:#82AAFF}html pre.shiki code .swJcz, html code.shiki .swJcz{--shiki-light:#E53935;--shiki-default:#F07178;--shiki-dark:#F07178}html pre.shiki code .sfNiH, html code.shiki .sfNiH{--shiki-light:#FF5370;--shiki-default:#FF9CAC;--shiki-dark:#FF9CAC}html .light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html.light .shiki span {color: var(--shiki-light);background: var(--shiki-light-bg);font-style: var(--shiki-light-font-style);font-weight: var(--shiki-light-font-weight);text-decoration: var(--shiki-light-text-decoration);}html .default .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .shiki span {color: var(--shiki-default);background: var(--shiki-default-bg);font-style: var(--shiki-default-font-style);font-weight: var(--shiki-default-font-weight);text-decoration: var(--shiki-default-text-decoration);}html .dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html.dark .shiki span {color: var(--shiki-dark);background: var(--shiki-dark-bg);font-style: var(--shiki-dark-font-style);font-weight: var(--shiki-dark-font-weight);text-decoration: var(--shiki-dark-text-decoration);}html pre.shiki code .sHwdD, html code.shiki .sHwdD{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#546E7A;--shiki-default-font-style:italic;--shiki-dark:#676E95;--shiki-dark-font-style:italic}html pre.shiki code .sHdIc, html code.shiki .sHdIc{--shiki-light:#90A4AE;--shiki-light-font-style:italic;--shiki-default:#EEFFFF;--shiki-default-font-style:italic;--shiki-dark:#BABED8;--shiki-dark-font-style:italic}",{"title":529,"searchDepth":567,"depth":567,"links":1221},[1222,1223,1224,1225],{"id":694,"depth":567,"text":316},{"id":811,"depth":567,"text":812},{"id":983,"depth":567,"text":984},{"id":1201,"depth":567,"text":1202},"Framework-agnostic factory with route filtering, session timing, and lifecycle hooks. Call it once at startup and reuse across requests.","md",[1229,1232],{"label":340,"icon":343,"to":341,"color":1230,"variant":1231},"neutral","subtle",{"label":354,"icon":107,"to":355,"color":1230,"variant":1231},{},{"title":345,"icon":348},{"title":507,"description":1226},"jrR5gM4N47j96nisEwXGF_GTGeo8G3av0oISM0JNjLA",[1238,1240],{"title":340,"path":341,"stem":342,"description":1239,"icon":343,"children":-1},"The core building block — extract safe user fields, mask emails, and capture plugin data (organizations, roles, 2FA) from a Better Auth session.",{"title":350,"path":351,"stem":352,"description":1241,"icon":300,"children":-1},"Mirror the server-side user identity into client-side logs by watching the Better Auth session and calling setIdentity.",1785230283630]