Steps

1. Use test invitation code to register test users.

   

2. Register test user again using test invitation code. Found that registration failed.

   

3. Try another idea. To make it easier to distinguish, I'll register and test with other usernames.

4. Register Sam users with test invitation code

   1. Register successfully

      

   2. Try logging in

      

   3. Login successful

      

5. After testing Sam user can log in repeatedly !!! Until I registered Axe user with test invitation code -> found that Sam user strangely can't login anymore.

   1. 

   2. Try to log in to Sam user -> Show: There was an error logging in.

   3. Try to log in to Axe user -> The login was found to be successful.

      

   4. Tried again to log in to the Sam user and found that the login failed!!! The user is no longer available.

Impact

1. Description test invitation code can be registered repeatedly, but not expire!

2. Explain that after the latest use of the invitation code, the previous registered account will be invalid