diff --git a/src/services/sessionService.js b/src/services/sessionService.js
index e8e563a..2438d05 100644
--- a/src/services/sessionService.js
+++ b/src/services/sessionService.js
@@ -27,8 +27,8 @@ class SessionServiceProvider {
       });
     };
 
-    async function isSessionValid(sessionUuid) {
-      const currentSession = await models.SessionCreated.findOne({
+    const isSessionValid = async (sessionUuid) => {
+      const currentSession = await this.models.SessionCreated.findOne({
         where: {
           uuid: sessionUuid,
         },
@@ -43,7 +43,7 @@ class SessionServiceProvider {
       }
 
       return true;
-    }
+    };
 
     const relateSessionToPublicKey = async (sessionUuid, publicKey) => {
       if (!(await isSessionValid(sessionUuid))) {