which role should I give to the created user for access to the mobile application.
Can you share more info on what do you mean by CREATED USER? Do these users exist in Active directory/LDAP? And are you talking about roles required to the application from device? What is the security configuration you have set for a particular app id?
Have a look at below guide
Granting role-based access in SAP Mobile Platform 3.0
Regards,
JK