Tituba and Cabeza de Vaca as a Postcolinial Subject: How do they Develop an American Identity through their journeys?

Based of the book “I, Tituba Black witch of salem and the film Cabeza de Vaca. How do they Develop an American Identity through their journeys? What does it mean to be American for them? In what ways are they Postcolonial Subjects? Qoute from text and point to spots in the film to back up ansewrrs