def upgrade():
    ### commands auto generated by Alembic - please adjust! ###
    op.add_column('settings', sa.Column('paypal_live_password', sa.String(), nullable=True))
    op.add_column('settings', sa.Column('paypal_live_signature', sa.String(), nullable=True))
    op.add_column('settings', sa.Column('paypal_live_username', sa.String(), nullable=True))