Hi Hareesh,
This issue occurs when the git repository is not able to recognise you as one of it's developers.
Things you can try:
1. Try logging out and logging back in.
2. Ask your Scrum master to remove you and add you back as one of the engineers.
Hope this resolves your query!
Did you put your username, password and select "Keep me signed in" option? That way studio pro will not prompt you everytime.