Update nwm-api page (#254)

docs/products/Data Management and Access Tools/bigquery-api/index.md

@@ -14,12 +14,13 @@ tags:
 More details about “Design and implementation of a BigQuery dataset and application programmer interface (API) for the U.S. National Water Model” paper can be found [here.](https://www.sciencedirect.com/science/article/pii/S1364815224001841)
 :::
 
-**Please submit the form below to request access to NWM BigQuery API.**
+# Steps to use CIROH NWM API
+1. Submit the form below to request access to [NWM BigQuery API](https://nwm-api.ciroh.org/).
 
 <a class="button button--active button--primary " style={{'margin-bottom':'1.3rem'}} href="https://forms.office.com/r/FeNpjZstkr">NWM BigQuery API Access Request Form</a>
 
+2. For an example usage, please refer to [this script](https://github.com/CIROH-UA/api-nwm-gcp/blob/main/examples/notebooks/nwm_usgs_streamflow_plot.ipynb). Replace your API key and API_URL = 'https://nwm-api.ciroh.org'.
 
-import GitHubReadme from '@site/src/components/GitHubReadme';
-
-<GitHubReadme username="BYU-Hydroinformatics" repo="api-nwm-gcp" />
+3. Estimate your query before running the actual query. If you're not sure this step, please contact [ciroh it support](mailto:[email protected]).
 
+For implementation detail, please refer to [this repository](https://github.com/CIROH-UA/api-nwm-gcp).