Tuya fix login problem and add login platform param

[huangyupeng]

Description:

1. add platform param to distinguish accounts from different apps. Default is tuya.
2. fix a bug which may cause login failed.
3. add the error reason while login failed.

Related issue (if applicable): fixes #15613

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.io#6048

Example entry for configuration.yaml (if applicable):

tuya:
  username: phone or email@example.com
  password: accountpassword
  country_code: 1
  platform: 'smart_life' or 'tuya'

Checklist:

• The code change is tested and works locally.
• Local tests pass with tox. Your PR cannot be merged unless tests pass

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.github.io

If the code communicates with devices, web services, or third-party tools:

• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New or updated dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

[balloob]

Thanks for the quick fix.

[bakerbug]

I’m having issues with the Tuya component. All was working well in 0.75.3 and with 0.76.1 I am getting the following exception:

2018-08-20 13:28:24 ERROR (MainThread) [homeassistant.setup] Error during setup of component tuya
Traceback (most recent call last):
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/setup.py”, line 148, in _async_setup_component
component.setup, hass, processed_config) # type: ignore
File “/usr/lib/python3.5/asyncio/futures.py”, line 380, in iter
yield self # This tells Task to wait for completion.
File “/usr/lib/python3.5/asyncio/tasks.py”, line 304, in _wakeup
future.result()
File “/usr/lib/python3.5/asyncio/futures.py”, line 293, in result
raise self._exception
File “/usr/lib/python3.5/concurrent/futures/thread.py”, line 55, in run
result = self.fn(*self.args, **self.kwargs)
File “/srv/homeassistant/lib/python3.5/site-packages/homeassistant/components/tuya.py”, line 65, in setup
tuya.init(username, password, country_code, platform)
File “/srv/homeassistant/lib/python3.5/site-packages/tuyapy/tuyaapi.py”, line 44, in init
self.get_access_token()
File “/srv/homeassistant/lib/python3.5/site-packages/tuyapy/tuyaapi.py”, line 68, in get_access_token
raise TuyaAPIException(message)
tuyapy.tuyaapi.TuyaAPIException: Get accesstoken failed. Username or password error!

I have verified that my credentials are valid (they didn’t change since I upgraded). I have also tried adding the new platform option to my tuya config set to both smart_life and tuya. All combinations result in the same exception.

[huangyupeng]

Could you please send me you account name ?

[MartinHjelmare]

@bakerbug Please open an issue for this, if you suspect a bug.