Implement an API endpoint an admin can use to update a user's password

[eecavanna]

In this branch, @shreddd implemented an API endpoint that administrators can use to update the password of an existing user.

Details

(TODO)

Related issue(s)

Fixes #778

Related subsystem(s)

• Runtime API (except the Minter)
• Minter
• Dagster
• Project documentation (in the docs directory)
• MongoDB migrations
• Other

Testing

• I tested these changes (explain below)
• I did not test these changes

I tested these changes by implementing a test_update_user test function and ensuring that it passes.

Documentation

• I have not checked for relevant documentation yet (e.g. in the docs directory)
• I have updated all relevant documentation so it will remain accurate
• Other (explain below)

This PR is being created by someone other than the branch author. I do not know the extent to which the branch author has considered documentation.

Maintainability

• Every Python function I defined includes a docstring (test functions are exempt from this)
• Every Python function parameter I introduced includes a type hint (e.g. study_id: str)
• All "to do" or "fix me" Python comments I added begin with either # TODO or # FIXME
• I used black to format all the Python files I created/modified
• The PR title is in the imperative mood (e.g. "Do X") and not the declarative mood (e.g. "Does X" or "Did X")

This PR is being created by someone other than the branch author. I do not know which of the above things the branch author has done.

[eecavanna]

I suggest omitting the retry-related info from the function's docstring and documenting it at the decoration level instead. In my mental model of the situation, the function, itself, doesn't "know" it has been decorated.

Suggested change

	base_url = os.getenv("API_HOST")
	@retry(wait=wait_random_exponential(multiplier=1, max=60), stop=stop_after_attempt(3))
	def get_token():
	"""
	Fetch an auth token from the Runtime API, retrying until successful.
	Randomly wait up to 2^x * 1 seconds between each retry until the range reaches 60
	seconds, then randomly up to 60 seconds afterwards
	"""
	base_url = os.getenv("API_HOST")
	# Try up to three times, waiting for up to 60 seconds between each attempt.
	@retry(wait=wait_random_exponential(multiplier=1, max=60), stop=stop_after_attempt(3))
	def get_token():
	"""
	Fetch an auth token from the Runtime API.
	"""