I have mistaken github profile migration. And I strived many times. And I research on the stack over flow and Google. Finally i found a solution. Someday you have like this problem. You can use this way.
Before i want to talk this problem. Why was this problem ?
I have already a GitHub account. Than i decided create a new github profile my new projects. Because this profile sufficiently mixed. Than i upload with git while a new account, an error occurred on git. Mistake words is here…
remote: Permission to user1/projectname.git denied to user1.
As i speak and I research on the Stack Over Flow and Google… Finally, i found this solution…
Open the terminal your pc.
And before you will write this commands.
git config user.name "new name"
git config credential.username "new name"
That's all! You can upload projects your new gitHub profile... God luck!