Authentication failed for 'https://github.com/Daniel-Santhanaraj/echelon.git/ code example
Example: authentication failed github
Authentication failed.
You may not have permission to access the repository
Stepa to fix issue:
1.Remove repo from GitHub Desktop
2.Logout from your github account [File > Options]
3.File > Add Local Repository
4.Repository > Repository Settings and change to https URL [Important tweek]
5.It started working back for me.