fix: api.v2.UserService/ListUserAccessTokens too many access tokens c…

…ause browser broken

server/route/api/v2/user_service.go

@@ -350,6 +350,11 @@ func (s *APIV2Service) ListUserAccessTokens(ctx context.Context, request *apiv2p
 		return nil, status.Errorf(codes.Internal, "failed to list access tokens: %v", err)
 	}
 
+	// limit only the first 20 access tokens.
+	if len(userAccessTokens) > 20 {
+		userAccessTokens = userAccessTokens[:20]
+	}
+
 	accessTokens := []*apiv2pb.UserAccessToken{}
 	for _, userAccessToken := range userAccessTokens {
 		claims := &auth.ClaimsMessage{}