source tree login error

I have following error frequencly.

git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree fetch origin
remote: Invalid username or password. If you log in via a third party service you must ensure you have an account password set in your account profile.
fatal: Authentication failed for 'https://serkankayaduman@bitbucket.org/dtvh/blutv_iphone.git/'

git -c diff.mnemonicprefix=false -c core.quotepath=false -c credential.helper=sourcetree pull --log origin master
remote: Too many failed authentication attempts. Please try again later.
fatal: unable to access 'https://serkankayaduman@bitbucket.org/dtvh/blutv_iphone.git/': The requested URL returned error: 429
Completed with errors, see above

My username and password is correct definitely. When it is, all of our team wait patiently and respectfully. After 15 minutes, everything is fine without changing. We lose a lot of time when doing fetch, push and pull.