Error when try to install/configure SQL Server

[tao sun]

Enter code here...

I use the following code to install Sql Server. The installation is fine except setting the login as "mix-mode". I am having trouble to find any information on this except one person 

Convert property 'SAPwd' value from type 'STRING' to type 'INSTANCE' failed

SECURITYMODE: SQL

SAPwd: 'Password'

- name: Install SQL Server with Product ID

  win_dsc:

    resource_name: SqlSetup

    InstanceName: "{{ item.instance_name }}"

    Features: SQLENGINE

    SQLCollation: "{{ item.instance_collation }}"

    SQLSvcAccount_username: "{{ item.svcaccount }}"

    SQLSvcAccount_password: "{{ item.svcpassword }}"

    SQLSysAdminAccounts: "{{ item.svcaccount }}"

    InstanceDir: "{{ item.instance_dir }}"

    InstallSQLDataDir: "{{ item.installdb_path }}"

    SQLUserDBDir: "{{ item.userldb_path }}"

    SQLUserDBLogDir: "{{ item.userdblog_path }}"

    SQLTempDBDir: "{{ item.tempdb_path }}"

    SQLTempDBLogDir: "{{ item.tempdblog_path }}"

    SQLBackupDir: "{{ item.backup_path }}"

    SourcePath: "{{ disk_image_out.results[0].mount_path }}"

    UpdateEnabled: False

    ForceReboot: False

    ProductKey: "{{ item.productkey }}"

    SECURITYMODE: SQL

    SAPwd: 'Password'

    #SAPwd_Username: sa

    #SAPwd_Password: Password

  with_items:

    - "{{ rl_mssql_instances }}"