SMA add re-authentication flow (#144538)
* Add reauth flow
* Small adjustment
* Update homeassistant/components/sma/config_flow.py
Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>
* Review feedback
* Update tests/components/sma/test_config_flow.py
Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>
* Update tests/components/sma/test_config_flow.py
Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>
* Feedback
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Co-authored-by: Joost Lekkerkerker <joostlek@outlook.com>