Git. Work with Bitbucket/GitHub repositories without username/password

Initially, you should have two generated keys: private - id_rsa and public - id_rsa.pub.

To do this, you need to run the command:

$ ssh-keygen -t rsa -b 4096 -f $HOME/.ssh/id_rsa

Next, you need to add your public key (its contents) via the web interface.
After that, you can work with your repositories without having to enter a password for every action you take.
But it's important to remember that you must work through ssh:// not through https://

If initially you cloned your repository like this

$ git clone https://git@REPOSITORY.git

then you need to change the remote URL to ssh://
To do this, run the command:

$ git remote set-url origin ssh://git@REPOSITORY.git

To look at current remote URL it's possible either that

$ git remote -v

or that

$ git config remote.origin.url