Upgrade database.

def upgrade():
    """Upgrade database."""
    op.create_table(
        'oauthclient_remoteaccount',
        sa.Column('id', sa.Integer(), nullable=False),
        sa.Column('user_id', sa.Integer(), nullable=False),
        sa.Column('client_id', sa.String(length=255), nullable=False),
        sa.Column(
            'extra_data',
            sqlalchemy_utils.JSONType(),
            nullable=False),
        sa.ForeignKeyConstraint(['user_id'], [u'accounts_user.id'], ),
        sa.PrimaryKeyConstraint('id'),
        sa.UniqueConstraint('user_id', 'client_id')
    )
    op.create_table(
        'oauthclient_useridentity',
        sa.Column('id', sa.String(length=255), nullable=False),
        sa.Column('method', sa.String(length=255), nullable=False),
        sa.Column('id_user', sa.Integer(), nullable=False),
        sa.ForeignKeyConstraint(['id_user'], [u'accounts_user.id'], ),
        sa.PrimaryKeyConstraint('id', 'method')
    )
    op.create_index(
        'useridentity_id_user_method', 'oauthclient_useridentity',
        ['id_user', 'method'], unique=True
    )
    op.create_table(
        'oauthclient_remotetoken',
        sa.Column('id_remote_account', sa.Integer(), nullable=False),
        sa.Column('token_type', sa.String(length=40), nullable=False),
        sa.Column(
            'access_token',
            sqlalchemy_utils.EncryptedType(),
            nullable=False),
        sa.Column('secret', sa.Text(), nullable=False),
        sa.ForeignKeyConstraint(
            ['id_remote_account'], [u'oauthclient_remoteaccount.id'],
            name='fk_oauthclient_remote_token_remote_account'
        ),
        sa.PrimaryKeyConstraint('id_remote_account', 'token_type')
    )