Unable to create a password protected influxDB

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I am working on a C# application with InfluxDB and Grafana. I am using InfluxData.Net (https://github.com/pootzko/InfluxData.Net#createdatabaseasync). I have to create a password protected Influx database. My code is:

```
var httpClientHandler = new HttpClientHandler();
httpClientHandler.ServerCertificateCustomValidationCallback = OnHandleSSl;
var client = new HttpClient(httpClientHandler);

InfluxDbClient _influxDbClient = new InfluxDbClient(Server, Username, Password, InfluxDbVersion.v_1_3, QueryLocation.FormData, client);
var response = await _influxDbClient.Database.CreateDatabaseAsync(DatabaseName);
```

Issue is that when i go to Grafana on the server and add new data source with this database, data source works fine and does not show any error regarding username/password. Even the data in the database is shown in the grafana. I am using InfluxDB image. I have also tried to enable INFLUXDB_HTTP_AUTH_ENABLED in DockerFile of InfluxDB. My DockerFile is:

```
FROM influxdb:1.7.6

ENV TZ=America/Los_Angeles
ENV INFLUXDB_HTTP_AUTH_ENABLED true

RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
```

When i run the image created from this DockerFile, i don't get INFLUXDB_HTTP_AUTH_ENABLED entry in influxdb.conf file. As per InfluxDB documentation, setting INFLUXDB_HTTP_AUTH_ENABLED in environment variable will enable the authentication on the influx server but, in my case its not working.

How can i make a password protected influx database through influxDB image ? What can be the possible issue ? I am stuck and unable to create the password protected database. Any help would be much appreciated.

Start with the supplied Dockerfile and the influxdb:1.7.6 image configuration, then check how INFLUXDB_HTTP_AUTH_ENABLED is read during container startup. Reproduce the setup and verify whether unauthenticated requests are rejected while the supplied credentials work; compare that behavior with the Grafana data-source configuration.

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