Why does SSH authentication with Git not work?

Even after setting up the SSH key authentication with Git following the instructions outlined in https://www.mathworks.com/help/matlab/matlab_prog/set-up-git-source-control.html

MATLAB still asks for username and password every time when trying to push into a remote repository.

Answer 1

[MathWorks Support Team]

One possible cause for the issue could be the improper cloning of the repository. In order to setup SSH authentication with Git, clone the repository using SSH and not HTTPS.

Another cause for the issue could be the improper format in which the SSH key has been generated. For more details, refer to the following MATLAB Answers post: 

https://www.mathworks.com/matlabcentral/answers/494543-why-do-i-receive-an-auth-fail-error-when-interacting-with-a-git-remote-over-ssh-in-matlab-or-why-d