Use "~" as a route namespace symbol

src/components/oauth_callback/oauth_callback.js

@@ -11,7 +11,7 @@ const oac = {
       }).then((result) => {
         this.$store.commit('setToken', result.access_token)
         this.$store.dispatch('loginUser', result.access_token)
-        this.$router.push('/p/main/friends')
+        this.$router.push('/~/main/friends')
       })
     }
   }