push error

Its picking some other user name and throwing permission error:

inensrivas2m2:github-for-developers srivas2$ git push origin -u demo-gitflow-ss
remote: Permission to githubteacher/github-for-developers.git denied to sansri05.
fatal: unable to access 'https://github.com/githubteacher/github-for-developers.git/': The requested URL returned error: 403

---

and Below is configuration:

inensrivas2m2:github-for-developers srivas2$ git config --list
core.editor=sublime -n -w
core.autocrlf=input
push.default=upstream
merge.conflictstyle=diff3
filter.lfs.clean=git lfs clean %f
filter.lfs.smudge=git lfs smudge %f
filter.lfs.required=true
user.name=srivas2
user.email=sandeep.srivastava@rsa.com
core.repositoryformatversion=0
core.filemode=true
core.bare=false
core.logallrefupdates=true
core.ignorecase=true
core.precomposeunicode=true
remote.origin.url=https://github.com/githubteacher/github-for-developers.git
remote.origin.fetch=+refs/heads/_:refs/remotes/origin/_
branch.master.remote=origin
branch.master.merge=refs/heads/master
user.name=srivas2
user.email=sandeep.srivastava@rsa.com