"""Retain LastActivityDate independently from LastLoginDate."""
from alembic import op
import sqlalchemy as sa

revision = '0003'
down_revision = '0002'
branch_labels = None
depends_on = None


def upgrade():
    op.add_column('app_user', sa.Column('last_activity_at', sa.DateTime(timezone=True), nullable=True))


def downgrade():
    op.drop_column('app_user', 'last_activity_at')