Help with Merge Request

Karinjo@Karinjo-PC MINGW64 /e/Autonomic (master)
$ git add Neuman.c

Karinjo@Karinjo-PC MINGW64 /e/Autonomic (master)
$ git commit -m “codeabbey, 24 (5.26)”
[master (root-commit) c9d507f] codeabbey, 24 (5.26)
2 files changed, 46 insertions(+)
create mode 100644 Neuman.c
create mode 160000 training

Karinjo@Karinjo-PC MINGW64 /e/Autonomic (karito1998)
$ git checkout -b karol1998
Switched to a new branch ‘karol1998’

Karinjo@Karinjo-PC MINGW64 /e/Autonomic (karol1998)
$ git remote add origin https://gitlab.com/autonomicmind/training/
fatal: remote origin already exists.

Karinjo@Karinjo-PC MINGW64 /e/Autonomic (karol1998)
$ git push origin karol1998
remote: HTTP Basic: Access denied
fatal: Authentication failed for ‘https://gitlab.com/autonomicmind/training.git/