Which phrase from the sentence provides the best clue to the meaning of credentials as it is used here

"proof of someone's qualifications, competence, or authority"

In order to provide an accurate answer, please provide the full sentence or context in which the word "credentials" is used. This will allow me to pinpoint the relevant phrase and offer a better explanation.

To provide the best clue to the meaning of "credentials" as it is used here, we would need the full sentence or context in which the word is being used. Please provide the complete sentence or more context for me to assist you accurately.