improvement: Add id as an option for sourcing uid for UserIdentity (#… #1044

Job	Run time
mix deps.get	27s
mix hex.audit	23s
MIX_ENV=test mix.compile	1m 12s
mix format --check-formatted	54s
mix spark.formatter --check	57s
mix credo --strict	44s
mix doctor --full --raise	59s
mix git_ops.check_message	48s
mix dialyzer	7m 51s
mix test	1m 40s
mix sobelow --config	48s
mix ash_postgres.generate_migrations --check	52s
mix spark.cheat_sheets --check	41s
mix deps.unlock --check-unused	42s
MIX_ENV=dev mix.compile	49s
mix docs	54s
mix git-ops.release	45s
Deploy docs to GitHub pages.	7s
	21m 33s

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