README.md in embulk-output-bigquery-0.6.0 vs README.md in embulk-output-bigquery-0.6.1

@@ -35,11 +35,11 @@
 |  project                             | string      | required unless service\_account's `json_keyfile` is given. | | project\_id |
 |  dataset                             | string      | required   |                          | dataset |
 |  location                            | string      | optional   | nil                      | geographic location of dataset. See [Location](#location) |
 |  table                               | string      | required   |                          | table name, or table name with a partition decorator such as `table_name$20160929`|
 |  auto_create_dataset                 | boolean     | optional   | false                    | automatically create dataset |
-|  auto_create_table                   | boolean     | optional   | true                     | `false` is available only for `append_direct` mode. Other modes requires `true`. See [Dynamic Table Creating](#dynamic-table-creating) and [Time Partitioning](#time-partitioning) |
+|  auto_create_table                   | boolean     | optional   | true                     | `false` is available only for `append_direct` mode. Other modes require `true`. See [Dynamic Table Creating](#dynamic-table-creating) and [Time Partitioning](#time-partitioning) |
 |  schema_file                         | string      | optional   |                          | /path/to/schema.json |
 |  template_table                      | string      | optional   |                          | template table name. See [Dynamic Table Creating](#dynamic-table-creating) |
 |  job_status_max_polling_time         | int         | optional   | 3600 sec                 | Max job status polling time |
 |  job_status_polling_interval         | int         | optional   | 10 sec                   | Job status polling interval |
 |  is_skip_job_result_check            | boolean     | optional   | false                    | Skip waiting Load job finishes. Available for append, or delete_in_advance mode |
@@ -211,11 +211,11 @@
 You can also embed contents of `json_keyfile` at config.yml.
 
 ```yaml
 out:
   type: bigquery
-  auth_method: service_account
+  auth_method: authorized_user
   json_keyfile:
     content: |
       {
         "client_id":"xxxxxxxxxxx.apps.googleusercontent.com",
         "client_secret":"xxxxxxxxxxx",
@@ -237,11 +237,16 @@
   auth_method: compute_engine
 ```
 
 #### application\_default
 
-Use Application Default Credentials (ADC).
+Use Application Default Credentials (ADC).  ADC is a strategy to locate Google Cloud Service Account credentials.
+
+1. ADC checks to see if the environment variable `GOOGLE_APPLICATION_CREDENTIALS` is set. If the variable is set, ADC uses the service account file that the variable points to.
+2. ADC checks to see if `~/.config/gcloud/application_default_credentials.json` is located. This file is created by running `gcloud auth application-default login`.
+3. Use the default service account for credentials if the application running on Compute Engine, App Engine, Kubernetes Engine, Cloud Functions or Cloud Run.
+
 See https://cloud.google.com/docs/authentication/production for details.
 
 ```yaml
 out:
   type: bigquery
@@ -254,16 +259,16 @@
 format to construct table ids.
 Table ids are formatted at runtime
 using the local time of the embulk server.
 
 For example, with the configuration below,
-data is inserted into tables `table_2015_04`, `table_2015_05` and so on.
+data is inserted into tables `table_20150503`, `table_20150504` and so on.
 
 ```yaml
 out:
   type: bigquery
-  table: table_%Y_%m
+  table: table_%Y%m%d
 ```
 
 ### Dynamic table creating
 
 There are 3 ways to set schema.
@@ -274,11 +279,11 @@
 
 ```yaml
 out:
   type: bigquery
   auto_create_table: true
-  table: table_%Y_%m
+  table: table_%Y%m%d
   schema_file: /path/to/schema.json
 ```
 
 #### Set template_table in dataset
 
@@ -286,10 +291,10 @@
 
 ```yaml
 out:
   type: bigquery
   auto_create_table: true
-  table: table_%Y_%m
+  table: table_%Y%m%d
   template_table: existing_table_name
 ```
 
 #### Guess from Embulk Schema