Publish curated MobilityOps source snapshot

backend/alembic/versions/b7c7b536df85_operational_user_credentials.py

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+"""operational user credentials
+
+Revision ID: b7c7b536df85
+Revises: 799d8800e241
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+revision = "b7c7b536df85"
+down_revision = "799d8800e241"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.add_column("users", sa.Column("email", sa.String(length=320), nullable=True))
+    op.add_column("users", sa.Column("password_hash", sa.String(length=512), nullable=True))
+    op.create_unique_constraint("uq_users_email", "users", ["email"])
+
+
+def downgrade() -> None:
+    op.drop_constraint("uq_users_email", "users", type_="unique")
+    op.drop_column("users", "password_hash")
+    op.drop_column("users", "email")