Allow the `sub` for a user-jwt to be set, independent of the `name`

[glen-84]

Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem? Please describe the problem.

I want to create a user-jwt with a specific sub, but when I do the following:

dotnet user-jwts create --claim "sub=1" --valid-for 3650d

The sub ends up as:

"sub": [
  "Glen",
  "1"
]

The name should not be included in the sub if there is already a value.

Describe the solution you'd like

Avoid inserting a value for sub if one has already been set.

Additional context

No response