Register for account here

https://register.metoffice.gov.uk/WaveRegistrationClient/public/register.do?service=datapoint

Then get an API Key

Login at 

https://logon.metoffice.gov.uk/opensso/UI/Login?goto=https%3A%2F%2Fregister.metoffice.gov.uk%2FWaveRegistrationClient%2Faddservice.html%3Fservice%3Ddatapoint&gx_charset=UTF-8&gx_charset=UTF-8

# License Key 

    METOFFICE_API_KEY = xxxxxxxxxxxxxxxxxxxxxxxxxx