Add bank user to demo application

TPP based application follow these steps

1. Add user to WSO2

2. Add user to OpenBanking gateway (TODO)

3. Login into ACEFintech application one of user

4. Add Bank account, and login into WSO2 with a newly created user

FPP based application follow these steps:

1. Add user to WSO2

2. Add user to OpenBanking gateway (TODO)

3. Login into LionFintech application with a newly created user