Access token as string not working for enterprise Github and Gitlab

[maximilianmordig]

gert/R/fetch.R

Line 48 in 3d5e13b

cred_cb <- make_cred_cb(password = password, verbose = verbose)

Calling

gert::git_clone(
      url = "https://github.company.com/repo1", path = ".", password = "accessToken"
    )

does not work because the username is not provided to make_cred_cb (NA).
By changing

gert/R/credentials.R

Line 40 in 3d5e13b

stop("To use a hardcoded password, include your username in the URL like 'https://jerry@github.com")

to username <- "git", this works with on-premise GitHub.
However, it does not work with on-premise Gitlab, where it fails with:

Error in libgit2::git_clone : 
  server requires authentication that we do not support

git2r::clone supports both via git2r::cred_token.