In order to comply with the various educational regulations across the country, the ability to sign in has been removed from Ozobot Blockly. We encourage your students to either save Ozobot Blockly programs to their device using the Save As feature or save their programs by generating an anonymous Share Code. They will need to make a note of the share code so they can enter it next time they want to work on the program. Once they make changes to the program, they need to generate a new share code at the end of each session.