fix: provider return type in SSO guards

packages/hoppscotch-backend/src/auth/guards/github-sso.guard.ts

@@ -1,14 +1,17 @@
 import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
 import { AuthGuard } from '@nestjs/passport';
 import { AuthProvider, authProviderCheck, throwHTTPErr } from '../helper';
+import { Observable } from 'rxjs';
 
 @Injectable()
 export class GithubSSOGuard extends AuthGuard('github') implements CanActivate {
-  canActivate(context: ExecutionContext): boolean {
+  canActivate(
+    context: ExecutionContext,
+  ): boolean | Promise<boolean> | Observable<boolean> {
     if (!authProviderCheck(AuthProvider.GITHUB))
       throwHTTPErr({ message: 'GitHub auth is not enabled', statusCode: 404 });
 
-    return true;
+    return super.canActivate(context);
   }
 
   getAuthenticateOptions(context: ExecutionContext) {

packages/hoppscotch-backend/src/auth/guards/google-sso.guard.ts

@@ -1,14 +1,17 @@
 import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
 import { AuthGuard } from '@nestjs/passport';
 import { AuthProvider, authProviderCheck, throwHTTPErr } from '../helper';
+import { Observable } from 'rxjs';
 
 @Injectable()
 export class GoogleSSOGuard extends AuthGuard('google') implements CanActivate {
-  canActivate(context: ExecutionContext): boolean {
+  canActivate(
+    context: ExecutionContext,
+  ): boolean | Promise<boolean> | Observable<boolean> {
     if (!authProviderCheck(AuthProvider.GOOGLE))
       throwHTTPErr({ message: 'Google auth is not enabled', statusCode: 404 });
 
-    return true;
+    return super.canActivate(context);
   }
 
   getAuthenticateOptions(context: ExecutionContext) {

packages/hoppscotch-backend/src/auth/guards/microsoft-sso-.guard.ts

@@ -1,20 +1,23 @@
 import { CanActivate, ExecutionContext, Injectable } from '@nestjs/common';
 import { AuthGuard } from '@nestjs/passport';
 import { AuthProvider, authProviderCheck, throwHTTPErr } from '../helper';
+import { Observable } from 'rxjs';
 
 @Injectable()
 export class MicrosoftSSOGuard
   extends AuthGuard('microsoft')
   implements CanActivate
 {
-  canActivate(context: ExecutionContext): boolean {
+  canActivate(
+    context: ExecutionContext,
+  ): boolean | Promise<boolean> | Observable<boolean> {
     if (!authProviderCheck(AuthProvider.MICROSOFT))
       throwHTTPErr({
         message: 'Microsoft auth is not enabled',
         statusCode: 404,
       });
 
-    return true;
+    return super.canActivate(context);
   }
 
   getAuthenticateOptions(context: ExecutionContext) {