Hi Wena,
There are two options,
First attach account_overview page on the web navigation give access to this page only admin,
create account and synchronise them.
Then user will be able to login with those credentials.
Second logic as an MxAdmin in native App
convert account_overview web page in native & microflow in nanoflow and give the access only to MxAdmin again use upper logic create account & synchronise them then user will be able to logic with those credentials.
SingUp Logic :-
take a button SignUp -> show a native page ->
on the page take parameter from account entity from administration module.
Take input like fullName,email,pass,confirmpass etc what you want you can also manage another entity for this for taking mobile number etc like this.
on the save button call a nanoflow ,commit the account object & synchronised them then close page.
Then user able to login with signup credentials.
Hope you like the answer.