Update README.md

Author: jctissier

README.md

@@ -1,6 +1,6 @@
 # Salesforce OAuth2, REST & SOAP API Examples (Python)
 
-Python implementations of Salesforce Oauth2 Flows, as well as authenticated REST API and SOAP API requests. Grab the code from this repository and get started!
+Python implementations of Salesforce Oauth2 Flows, as well as authenticated REST API, SOAP API and Metadata API requests. Grab the code from this repository and get started!
 
 
 ## Table of Contents
@@ -11,6 +11,7 @@ Python implementations of Salesforce Oauth2 Flows, as well as authenticated REST
 | [Oauth - Web Server](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples/blob/master/README.md#3---web-server-oauth-authentication-flow)     | [Link](https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_understanding_web_server_oauth_flow.htm)           | [Link](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples/blob/master/Oauth2-Flow/salesforce_web_server_flow.py)  |
 | [Force.com REST API](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples#rest-api-using-the-username-password-oauth-authentication-flow)                      | [Link](https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_what_is_rest_api.htm)           | [Link](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples/blob/master/REST-API/rest_api.py)  |
 | [Force.com SOAP API] - Not completed                      | [Link]           | [Link]  |
+| [Metadata API] - Not completed                      | [Link]           | [Link]  |
 | [Notes](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples/blob/master/README.md#notes)                
 
 ***
@@ -159,8 +160,8 @@ print(sf_authentication.json())                 # Print the JSON response
 
 ***
 
-## REST API using the Username-Password OAuth Authentication Flow
-| [Salesforce Documentation](https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_what_is_rest_api.htm)                         | [Code Sample](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples/blob/master/REST-API/rest_api.py) |
+## REST API - Username-Password OAuth Authentication Flow
+| [Salesforce Documentation](https://developer.salesforce.com/docs/atlas.en-us.api_rest.meta/api_rest/intro_what_is_rest_api.htm)                         | [Code Sample](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples/blob/master/Salesforce-APIs/REST_Api.py) |
 | ------------------------------|:-------------:|
 
 **Example**
@@ -195,7 +196,17 @@ print(get_request.json())
 {'recentItems': [], 'objectDescribe': {'feedEnabled': True, 'layoutable': True, 'replicateable': True, 'deprecatedAndHidden': False, 'updateable': True, 'mergeable': True, 'activateable': False, 'name': 'Account', 'searchable': True, 'queryable': True, 'undeletable': True, 'retrieveable': True, 'deletable': True, 'mruEnabled': True, 'isSubtype': False, 'customSetting': False, 'label': 'Account', 'triggerable': True, 'hasSubtypes': False, 'custom': False, 'urls': {'listviews': '/services/data/v39.0/sobjects/Account/listviews', 'compactLayouts': '/services/data/v39.0/sobjects/Account/describe/compactLayouts', 'defaultValues': '/services/data/v39.0/sobjects/Account/defaultValues?recordTypeId&fields', 'quickActions': '/services/data/v39.0/sobjects/Account/quickActions', 'rowTemplate': '/services/data/v39.0/sobjects/Account/{ID}', 'layouts': '/services/data/v39.0/sobjects/Account/describe/layouts', 'sobject': '/services/data/v39.0/sobjects/Account', 'describe': '/services/data/v39.0/sobjects/Account/describe', 'approvalLayouts': '/services/data/v39.0/sobjects/Account/describe/approvalLayouts'}, 'keyPrefix': '001', 'labelPlural': 'Accounts', 'createable': True}}
 """
 ```
+***
+
+## SOAP API - Username-Password OAuth Authentication Flow
+| [Salesforce Documentation](https://developer.salesforce.com/docs/atlas.en-us.api.meta/api/sforce_api_concepts_security.htm)                         | [Code Sample](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples/blob/master/Salesforce-APIs/SOAP_Api.py) |
+| ------------------------------|:-------------:|
 
+***
+
+## Metadata API - Username-Password OAuth Authentication Flow
+| [Salesforce Documentation](https://developer.salesforce.com/docs/atlas.en-us.api_meta.meta/api_meta/file_based.htm)                         | [Code Sample](https://github.com/jctissier/Salesforce-Oauth2-REST-SOAP-API-Python-Examples/blob/master/Salesforce-APIs/Metadata_Api.py) |
+| ------------------------------|:-------------:|
 
 ## Notes
 **Author**: Jean-Claude Tissier