lib/aerospike/client.rb
def create_user(user, password, roles, options = nil)
      policy = create_policy(options, AdminPolicy, default_admin_policy)
      hash = AdminCommand.hash_password(password)
      command = AdminCommand.new
      command.create_user(@cluster, policy, user, hash, roles)
    end
def create_user(user, password, roles, options = nil)
      policy = create_policy(options, AdminPolicy, default_admin_policy)
      hash = AdminCommand.hash_password(password)
      command = AdminCommand.new
      command.create_user(@cluster, policy, user, hash, roles)
    end
-------------------------------------------------------
 User administration
-------------------------------------------------------
 Create user with password and roles. Clear-text password will be hashed using bcrypt
 before sending to server.