Sourcetree fails to authenticate again and again (Windows + Mac + everywhere)

[Mitch_Furlong_-_YourCreative]

So, I'm sort of at my wit's end here. 

Everyone in my team is set up with SourceTree:

• On both on Windows and Mac
• Some with HTTPS and some with SSH (and some trying to just use username + password)
• Some using embedded Git, some using system Git

...and every single person cannot stay authenticated. We can log in and it can push, but if you reopen it and try to push, you get the classic "fatal: Authentication failed" issue. Every day. 

I feel like we've covered every possible base - Is anyone able to shed any light on why this just, keeps happening? 

[Manju]

My first suggestion is to regularize using either https or ssh and not both. 

Next, if you are using ssh; please make sure your ssh-agent has loaded your keys.

Run below commands in terminal to do so,

To check if keys are loaded:

ssh-add -l

If none found, add keys to agent:

ssh-add <path_to_key>

more like,

ssh-add ~/.ssh/id_rsa

Key in the passphrase used while generating the ssh key and you should be good to go.