Add migration to add user_deletion table

h/migrations/versions/1671cf35fb34_add_user_deletion_table.py

@@ -0,0 +1,26 @@
+"""Add user_deletion table."""
+
+from alembic import op
+from sqlalchemy import Column, DateTime, Integer, String, text
+
+revision = "1671cf35fb34"
+down_revision = "857c71c8f5f3"
+
+
+def upgrade():
+    op.create_table(
+        "user_deletion",
+        Column("id", Integer(), primary_key=True, autoincrement=True, nullable=False),
+        Column("userid", String(), nullable=False),
+        Column(
+            "requested_at", DateTime(), server_default=text("now()"), nullable=False
+        ),
+        Column("requested_by", String(), nullable=False),
+        Column("tag", String(), nullable=False),
+        Column("registered_date", DateTime(), nullable=False),
+        Column("num_annotations", Integer(), nullable=False),
+    )
+
+
+def downgrade():
+    op.drop_table("user_deletion")