Bellevue technology company Auth0 announced a $55 million funding round last week, the third investment round for the growing company in two years. Auth0 develops technology to help verify and protect people’s online identities. It provides a software service that companies can use to create secure online logins. Its services allow companies to implement security features such as two-factor authentication on their websites, with minimal effort from software developers. Auth0 has now raised more than $110 million since it was founded in 2013.