DOCSP-40409 fixed the the error in app services docs (#775)

## Pull Request Info

Jira ticket: https://jira.mongodb.org/browse/DOCSP-40409

- [Atlas App Services Email/Password
Authentication](https://preview-mongodbosharafmdb.gatsbyjs.io/atlas-app-services/DOCSP-40409-the-the-correction/authentication/email-password/):
changed "the the" to "the" and added meta data
- [Query MongoDB Atlas
Read](https://preview-mongodbosharafmdb.gatsbyjs.io/atlas-app-services/DOCSP-40409-the-the-correction/functions/mongodb/read/):
changed "the the" to "the" and added meta data
- [Users & Authentication
Providers](https://preview-mongodbosharafmdb.gatsbyjs.io/atlas-app-services/DOCSP-40409-the-the-correction/reference/config/auth/):
changed "the the" to "the" and added meta data
- [Users & Authentication Providers
v20210101](https://preview-mongodbosharafmdb.gatsbyjs.io/atlas-app-services/DOCSP-40409-the-the-correction/reference/config/v20210101/auth/):
changed "the the" to "the" and added meta data
- [Tutorial: Atlas Device Sync for
C++](https://preview-mongodbosharafmdb.gatsbyjs.io/atlas-app-services/DOCSP-40409-the-the-correction/tutorial/cpp/):
changed "the the" to "the"

### Reminder Checklist

Before merging your PR, make sure to check a few things.

- [x] Did you tag pages appropriately?
  - genre
  - programming_language
  - meta.keywords
  - meta.description
- [x] Describe your PR's changes in the Release Notes section
- [x] Create a Jira ticket for related docs-realm work, if any

### Release Notes

- **Authentication**
  - Email/Passwords: changed "the the" typo to "the" and added meta data
- **Functions**
  - MongoDB > Read: changed "the the" typo to "the" and added meta data
- **Reference**
- App Configuration Files > User & Authorization Providers: changed "the
the" typo to "the" and added meta data
- App Configuration Files > v20210101 > User & Authorization Providers:
changed "the the" typo to "the" and added meta data
- **Tutorials**
  - C++ Device Sync: changed "the the" typo to "the"

### Review Guidelines


[REVIEWING.md](https://github.com/mongodb/docs-app-services/blob/master/REVIEWING.md)

source/authentication/email-password.txt

@@ -6,6 +6,13 @@ Email/Password Authentication
 
 .. default-domain:: mongodb
 
+.. meta:: 
+  :description: Learn about using email/password authentication in your Atlas App Services App.
+
+.. facet::
+  :name: genre
+  :values: reference
+
 .. contents:: On this page
    :local:
    :backlinks: none
@@ -531,7 +538,7 @@ The custom password reset function must return an object that contains a
        it does not directly handle a ``pending`` case. You must implement custom
        logic in your application to complete the password reset process. For
        example, you might implement a deep link or universal link in the client 
-       to extract the ``token`` and ``tokenId``, and then call the the 
+       to extract the ``token`` and ``tokenId``, and then call the 
        ``resetPassword`` method to complete a reset. 
 
    * - ``fail``

source/functions/mongodb/read.txt

@@ -6,6 +6,13 @@ Read Data from MongoDB Atlas - Functions
 
 .. default-domain:: mongodb
 
+.. meta:: 
+  :description: Use Atlas Functions to query and read data from MongoDB Atlas.
+
+.. facet::
+  :name: genre
+  :values: reference
+
 .. contents:: On this page
    :local:
    :backlinks: none
@@ -269,7 +276,7 @@ For more information, see the :manual:`Query an Array
 .. example::
 
    The following query matches documents where the ``reviews`` array
-   contains one or more elements that match all of the the specified
+   contains one or more elements that match all of the specified
    documents:
 
    .. code-block:: javascript

source/openapi-admin-v3.yaml

@@ -4093,7 +4093,7 @@ paths:
           in: query
           description: |-
             The ISO 8601 date and time of the end of the query period. Default is
-            23:59:59 UTC on the the last day of the current month.
+            23:59:59 UTC on the last day of the current month.
           schema:
             type: string
           required: false
@@ -4206,7 +4206,7 @@ paths:
           in: query
           description: |-
             The ISO 8601 date and time of the end of the query period. Default is
-            23:59:59 UTC on the the last day of the current month.
+            23:59:59 UTC on the last day of the current month.
           schema:
             type: string
           required: false

source/reference/config/auth.txt

@@ -4,7 +4,13 @@
 User & Authentication Provider Configuration Files
 ==================================================
 
-.. default-domain:: mongodb
+
+.. meta:: 
+  :description: Enable and configure authentication providers in your Atlas App Services App. 
+
+.. facet::
+  :name: genre
+  :values: reference
 
 .. contents:: On this page
    :local:
@@ -77,7 +83,7 @@ configuration fields.
    * - | ``name``
        | ``string``
      - The name of the authentication provider. This will always be the same as
-       the the provider's ``type``.
+       the provider's ``type``.
 
    * - | ``type``
        | ``string``

source/reference/config/v20210101/auth.txt

@@ -8,6 +8,13 @@ User & Authentication Provider Configuration Files
 
 .. default-domain:: mongodb
 
+.. meta:: 
+  :description: Enable and configure authentication providers in your Atlas App Services App using the deprecated Realm CLI.
+
+.. facet::
+  :name: genre
+  :values: reference
+
 .. contents:: On this page
    :local:
    :backlinks: none
@@ -81,7 +88,7 @@ configuration fields.
    * - | ``name``
        | String
      - The name of the authentication provider. This will always be the same as
-       the the provider's ``type``.
+       the provider's ``type``.
 
    * - | ``type``
        | String

source/tutorial/cpp.txt

@@ -561,7 +561,7 @@ when the app opens, we add a subscription for all ``Item`` objects:
 In the ``toggleSubscriptions()`` function, we switch the subscription,
 depending on the current subscription state. In the UI, the user can
 toggle between showing all items, or showing only their own items.
-Within this function, find the the ``_myItemSubscriptionName`` logic. 
+Within this function, find the ``_myItemSubscriptionName`` logic. 
 If there isn't already a subscription for this subscription name, the app
 adds a subscription to all documents where the ``owner_id`` property
 matches the authenticated user's id.