diff --git a/src/errors/AppError.ts b/src/errors/AppError.ts
index a5aec50..f45c974 100644
--- a/src/errors/AppError.ts
+++ b/src/errors/AppError.ts
@@ -22,4 +22,7 @@ export const Errors = {
   INVALID_TOKEN: new AppError('INVALID_TOKEN', 400, 'Invalid or already used token'),
   TOKEN_EXPIRED: new AppError('TOKEN_EXPIRED', 400, 'Token has expired'),
   ALREADY_CONFIRMED: new AppError('ALREADY_CONFIRMED', 400, 'User is already confirmed'),
+
+  //Auth errors
+  UNAUTHORIZED: new AppError('UNAUTHORIZED', 401, 'Non authentifié'),
 }
\ No newline at end of file
diff --git a/src/middleware/verifyAuth.ts b/src/middleware/verifyAuth.ts
new file mode 100644
index 0000000..df2a836
--- /dev/null
+++ b/src/middleware/verifyAuth.ts
@@ -0,0 +1,16 @@
+import { FastifyRequest, FastifyReply } from 'fastify'
+import { verifyAuthToken } from '../services/authToken.service.js'
+import { Errors } from '../errors/AppError.js'
+
+export async function verifyAuth(request: FastifyRequest, reply: FastifyReply) {
+  const token = request.cookies['authToken']
+
+  if (!token) throw Errors.UNAUTHORIZED
+
+  try {
+    const payload = await verifyAuthToken(request.server, request.server.prisma, token)
+    request.user = payload
+  } catch {
+    throw Errors.UNAUTHORIZED
+  }
+}
\ No newline at end of file
diff --git a/src/types/fastify.d.ts b/src/types/fastify.d.ts
index ad0a8a2..6e92df4 100644
--- a/src/types/fastify.d.ts
+++ b/src/types/fastify.d.ts
@@ -4,4 +4,11 @@ declare module 'fastify' {
   interface FastifyInstance {
     prisma: PrismaClient
   }
+
+  interface FastifyRequest {
+    user: {
+      userId: string
+      tokenVersion: number
+    }
+  }
 }
\ No newline at end of file