Hello there!

I am trying to test mess around with git. I made an account on BitBucket and I created a folder called test. I made it a repo and I tried to connect it to the BitBucket. 

SSH is the protocol that I used. I created that ssh through terminal with the command 
ssh-keygen -t rsa -C "youremail@mail.com"

Of course I have put my real email there. Then I called that key id_rsa2 and it created private and .pub type of file, which I guess it should. Then I accessed that .pub key and copied and pasted into the bitbucket in settings of my profile. 
After that I created a .txt file, just for testing purposes, made some changes to it and did a classic 
$ git add .

$ git commit -m "My first commit to BitBucket"

and the finally 
$ git push origin master

That should have done the job and pushed the file to the BitBucket. Here is the error that I got in the Git Bash command line (link below , sorry I just could not get the image going )

Can anyone guess what the heck is going on and why do I have this type of error ? :)