var (
ErrEmptyResponse = errors.New("no response")
ErrMissingToken = errors.New("missing the COHERE_API_KEY key, set it in the COHERE_API_KEY environment variable")
ErrUnexpectedResponseLength = errors.New("unexpected length of response")
)
WithBaseURL passes the Cohere base url to the client. If not set, the base url
is read from the COHERE_BASE_URL environment variable. If still not set in ENV
VAR COHERE_BASE_URL, then the default value is https://api.cohere.ai is used.