Credit adverbs are provided in this article. The words listed here are commonly found along with the verb credit in sentences. This reference page helps answer the question what are some adverbs that describe or modify the verb CREDIT.
easily
fully
hardly
readily
scarcely
Hope this word list had the credit adverb you were looking for. In addition to adverbs used with credit, other example verb adverb pairings can be found on this site.
You can help by adding more adverbs in the comments. Thanks.