Fix Custom APIs for VoIP App -- 3

I'm seeking a skilled developer to troubleshoot and resolve issues with our custom APIs for a mobile app using Magnus Billing for VoIP. The APIs in question are Create Account and Login.

Ideal Skills and Experience:
- Expertise in API development and integration
- Experience with Magnus Billing
- Strong problem-solving skills
- Familiarity with mobile app backend services

Your tasks will include:
- Diagnosing the issues with the Create Account and Login APIs
- Implementing fixes to ensure expected behavior
- Testing the APIs to verify the issues are resolved

Issue which we are facing -
- When a new SIP account is created via our custom API, the user can log in, but the SIP account does not register on the mobile softphone/app.
- However, when the same account is created directly from the Magnus Billing admin panel, the SIP registration works perfectly.
- Once an account is created from the panel, all accounts (including those created via API) start working fine.
It should be work for both as same from mobile api and panel signup