'The Movie Database' (TMDb) is the main Metadata source. To use this service, you need to sign up for 'The Movie Database' (TMDb) and request an API Key:-Login to TMDB (https://www.themoviedb.org)-(Click on your) User ID (top right corner) and select - Settings-(left side click) API-Request API Key-Copy the 'API Key (v3 auth)' key and paste it as the first option in the 'Data Provider Key Management' Tool.
The Movie Database – API Key Maintenance
-(left side click of your screen) API (click)
The Movie Database – API Key Maintenance
-Follow the process to Request API Key (click on appropriate option ie. select for Personal or Business option). Once you've completed the process, you will get your API Key.
The Movie Database – API Key Maintenance
-Copy the 'API Key (v3 auth)' key and paste it as the first option, which should be 'TMDB' (as seen in the picture immediately below) in the 'Data Provider Key Management' Tool.
Metadata Utility API Management
(Make sure you have 'TMDb' selected/active by clicking the 'Active' check box and make sure the First the very first entry is for 'TMDb')