func (s *FilterSuite) APILogin(c *gc.C, unit *state.Unit) {
password, err := utils.RandomPassword()
c.Assert(err, gc.IsNil)
err = unit.SetPassword(password)
c.Assert(err, gc.IsNil)
s.st = s.OpenAPIAs(c, unit.Tag(), password)
s.uniter = s.st.Uniter()
c.Assert(s.uniter, gc.NotNil)
}