feat: referal spec on registration

alembic/versions/135672cdf14a_user_referal_code.py

@@ -0,0 +1,34 @@
+"""+user.referal_code
+
+Revision ID: 135672cdf14a
+Revises: 72e78a8a43cf
+Create Date: 2026-08-03 10:26:22.290547
+
+"""
+from typing import Sequence, Union
+
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision: str = '135672cdf14a'
+down_revision: Union[str, Sequence[str], None] = '72e78a8a43cf'
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('users', sa.Column('referal_code', sa.TEXT(), nullable=False))
+    op.create_unique_constraint(None, 'users', ['referal_code'])
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    """Downgrade schema."""
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(None, 'users', type_='unique')
+    op.drop_column('users', 'referal_code')
+    # ### end Alembic commands ###