java.lang.IllegalArgumentException: User login size is incorrect (Between 3 and 255 characters)

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java.lang.IllegalArgumentException: User login size is incorrect (Between 3 and 255 characters)
at org.sonar.api.internal.google.common.base.Preconditions.checkArgument(Preconditions.java:122)
at org.sonar.api.server.authentication.UserIdentity$Builder.validateLogin(UserIdentity.java:196)
at org.sonar.api.server.authentication.UserIdentity$Builder.build(UserIdentity.java:183)
at org.sonar.server.authentication.RealmAuthenticator.synchronize(RealmAuthenticator.java:118)
at org.sonar.server.authentication.RealmAuthenticator.doAuthenticate(RealmAuthenticator.java:98)
at org.sonar.server.authentication.RealmAuthenticator.authenticate(RealmAuthenticator.java:83)
at org.sonar.server.authentication.CredentialsAuthenticator.authenticate(CredentialsAuthenticator.java:56)
at org.sonar.server.authentication.CredentialsAuthenticator.authenticate(CredentialsAuthenticator.java:45)
at org.sonar.server.authentication.ws.LoginAction.authenticate(LoginAction.java:91)
at org.sonar.server.authentication.ws.LoginAction.doFilter(LoginAction.java:76)

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