Multiple GitHub & BitBucket accounts - multiple SSH keys howto? (MacOSX 10.13)

[hvisage]

So problem:

I have multiple accounts (several work/clients, personal) on both BitBucket and GitHub.

I have sorted that mess out using hostnames like client1-github, client2-github, work-github and personal-github in my ~/.ssh/config file, each then points to the correct SSH key (No, you can't use the same SSH key for multiple accounts, and I can't use the same work account on some clients as they want the @client.com accounts). I also am a bit stuck in NOT using the HTTPS methods as that involves passwords on the commandline for the repos which I need to avoid

The problem now is that SourceTree doens't pick that up, or write SSH keys so now it displays warnings and can't "connect" to previously connected gitHub/BitBucket accounts.


Is there a way to tell SourceTree
1) Which Key to use/point to for an specific GitHub/BitBucket account?
2) to spefify the SSH/git hostname to be used for GitHub/GitLab/BitBuccket for the SSH connections to be made via ~/.ssh/config?


Seems that SourceTree is very specifically made only for a user(s) that have a single GitHub/Bitbucket account ;(

[Manju]

One way is to generate ssh keys from sourcetree itself to have it write the config with the right keys.

[hvisage]

Do I then have to generate these keys on EACH computer I have the multiple accounts and have the plethora of SSH keys then in BitBucket/GitHub/etc?

It still seems to fail when adding the 2nd/3rd/4th SSH key for the next account as it doesn't seem to have a distinction in the ~/.ssh/config as it uses the same git@bitbucket/git@github , just the extra keys, thus it again fails ;(