// ConditionExpression → ValueExpression ("=" | "<>" | "<=" | ">=" | "<" | ">") ValueExpression
//                     | ValueExpression "LIKE" ValueExpression ("ESCAPE" LitString)?
//                     | ValueExpression ("NOT"? "BETWEEN" ValueExpression "AND" ValueExpression)
//                     | ValueExpression "IN" "(" Expression ("," Expression)* ")"
//                     | ValueExpression
// ValueExpression     → Operand
//

  
  When configuring a JWT authenticator:
  
  If username.expression uses 'claims.email', then 'claims.email_verified' must be used in
  username.expression or extra[*].valueExpression or claimValidationRules[*].expression.
  An example claim validation rule expression that matches the validation automatically
  applied when username.claim is set to 'email' is 'claims.?email_verified.orValue(true) == true'. 

- When configuring a JWT authenticator:
  
  If `username.expression` used 'claims.email', then 'claims.email_verified' must have been used in `username.expression` or `extra[*].valueExpression` or `claimValidationRules[*].expression`. An example claim validation rule expression that matches the validation automatically applied when `username.claim` is set to 'email' is 'claims.?email_verified.orValue(true) == true'.