added private network to cloudsql instance creation

plugins/modules/gcp_sql_instance.py

@@ -255,6 +255,12 @@ options:
             - Whether the instance should be assigned an IP address or not.
             required: false
             type: bool
+          private_network:
+            description:
+            - The resource link for the VPC network from which the Cloud SQL instance is accessible for private IP
+              (e.g /projects/myProject/global/networks/default)
+            required: false
+            type: str
           authorized_networks:
             description:
             - The list of external networks that are allowed to connect to the instance
@@ -860,6 +866,7 @@ def main():
                         type='dict',
                         options=dict(
                             ipv4_enabled=dict(type='bool'),
+                            private_network=dict(type='str'),
                             authorized_networks=dict(
                                 type='list', elements='dict', options=dict(expiration_time=dict(type='str'), name=dict(type='str'), value=dict(type='str'))
                             ),
@@ -1251,6 +1258,7 @@ class InstanceIpconfiguration(object):
         return remove_nones_from_dict(
             {
                 u'ipv4Enabled': self.request.get('ipv4_enabled'),
+                u'privateNetwork': self.request.get('private_network'),
                 u'authorizedNetworks': InstanceAuthorizednetworksArray(self.request.get('authorized_networks', []), self.module).to_request(),
                 u'requireSsl': self.request.get('require_ssl'),
             }
@@ -1260,6 +1268,7 @@ class InstanceIpconfiguration(object):
         return remove_nones_from_dict(
             {
                 u'ipv4Enabled': self.request.get(u'ipv4Enabled'),
+                u'privateNetwork': self.request.get(u'privateNetwork'),
                 u'authorizedNetworks': InstanceAuthorizednetworksArray(self.request.get(u'authorizedNetworks', []), self.module).from_response(),
                 u'requireSsl': self.request.get(u'requireSsl'),
             }

plugins/modules/gcp_sql_instance_info.py

@@ -339,6 +339,12 @@ resources:
               - Whether the instance should be assigned an IP address or not.
               returned: success
               type: bool
+            privateNetwork:
+              description:
+              - The resource link for the VPC network from which the Cloud SQL instance is accessible for private IP
+                (e.g /projects/myProject/global/networks/default)
+              returned: success
+              type: str
             authorizedNetworks:
               description:
               - The list of external networks that are allowed to connect to the instance