refactor(getUserTokenFromVSCode): separate the verifying process from the function

test/home.html

@@ -201,6 +201,20 @@ header("Allow: GET, POST, OPTIONS, PUT, DELETE");
 
         window.onload = async function() {
             await getUserTokenFromVSCode()
+            .then(async userToken => {
+                // verify user token
+                await verifyToken(userToken)
+                .then(result => {
+                    // initialize user token
+                    USERTOKEN = userToken
+                })
+                .catch(error => {
+                    console.error('Error in verifying token:', error)
+                })
+            })
+            .catch(error => {
+                console.error("Failed to get user token from vscode: ", error)
+            })
 
             if (USERTOKEN) {
                 loadPageModules()
@@ -215,25 +229,19 @@ header("Allow: GET, POST, OPTIONS, PUT, DELETE");
         }
 
         async function getUserTokenFromVSCode() {
-            await communicateVSCodeByWebview('getUserToken', null)
+            return new Promise(async (resolve, reject) => {
-            .then(async data => {
+                await communicateVSCodeByWebview('getUserToken', null)
-                const userToken = data.userToken
+                .then(async data => {
-                if (userToken === '') {
+                    const userToken = data.userToken
-                    // do nothing
-                } else {
-                    // verify user token
-                    await verifyToken(userToken)
-                        .then(result => {
-                            USERTOKEN = userToken
-                        })
-                        .catch(error => {
-                            console.error('Error in verifying token:', error)
-                        })
-                }
 
-            })
+                    if (userToken === undefined) {
-            .catch(error => {
+                        reject("userToken is undefined")
-                console.error('Failed to get user token: ', error)
+                    }
+                    resolve(userToken)
+                })
+                .catch(error => {
+                    reject(error)
+                })
             })
         }