Who is the first person Abigail claims practiced witchcraft?

In Arthur Miller's play "The Crucible," Abigail Williams first claims that Tituba, the enslaved woman from Barbados, practiced witchcraft. Abigail accuses Tituba of forcing her and the other girls to engage in witchcraft, which serves as a catalyst for the ensuing witch trials in Salem. This accusation is pivotal as it shifts the blame onto Tituba and ignites the hysteria surrounding witchcraft in the community.