fix: update migration file

Author: VictoriaTskhondia

backend/src/alembic/versions/1425c896d3ef_add_auth0_id_field_to_users_table.py

@@ -19,19 +19,20 @@
 
 def upgrade():
     # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('user', sa.Column('auth0_id', sa.String(), nullable=True))
+
     op.alter_column('user', 'hashed_password',
-               existing_type=sa.VARCHAR(),
-               nullable=True)
-    op.drop_index('ix_user_auth0_id', table_name='user')
+                    existing_type=sa.VARCHAR(),
+                    nullable=True)
     op.create_index(op.f('ix_user_auth0_id'), 'user', ['auth0_id'], unique=False)
     # ### end Alembic commands ###
 
 
 def downgrade():
     # ### commands auto generated by Alembic - please adjust! ###
     op.drop_index(op.f('ix_user_auth0_id'), table_name='user')
-    op.create_index('ix_user_auth0_id', 'user', ['auth0_id'], unique=True)
+    op.drop_column('user', 'auth0_id')
     op.alter_column('user', 'hashed_password',
-               existing_type=sa.VARCHAR(),
-               nullable=False)
+                    existing_type=sa.VARCHAR(),
+                    nullable=False)
     # ### end Alembic commands ###