What led to Steven Riley's resignation from the GSA?

Steven Riley, lead engineer at the GSA, resigned in protest after Thomas Shedd, a former Tesla employee installed by Elon Musk, demanded full read/write access to the notify.gov system. Riley objected to Shedd's ability to view and potentially download citizens' personally identifying information, including phone numbers. Despite raising concerns about protecting sensitive data, Riley was unable to prevent this access request. In his resignation letter, Riley stated he couldn't operate a system without the ability to manage access to Americans' personal information. His principled stand alerted the public to this concerning development in government data security.