The Pokémon Trainer Club has officially been renamed Pokémon Trainer Central, unifying the login experience across multiple games. Your Pokémon Trainer Central account can now be used in Pokémon GO, Pokémon UNITE, Pokémon Trading Card Game Live and other Pokémon titles, making it easier to manage friends, progress and rewards across the series. The change is designed to simplify account management and create a consistent hub for Trainers in the Pokémon ecosystem. Players who already have a Pokémon Trainer Club account can log in as usual under the new name without losing access to any of their existing data or content.
Source: Pokemon.com
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