Spring Request to make properties for IAM on R2DBC more clear

Affects: Sping boot 3.0.1

I'm trying to use IAM on google cloud sql in combination with Spring boot and R2DBC. My application.yml contains:

spring:
  cloud:
    gcp:
      project-id: ...
      sql:
        database-name: ...
        enable-iam-auth: true
        instance-connection-name: ...
  r2dbc:
    username: ...
    password: IgnoredButRequired

The r2dbc url gets constructed using properties from spring.cloud.sql (database name and instance-connection-name). However, the enable-iam-auth is not used. In order to make IAM work for R2DBC, I have to specify: spring.r2dbc.properties.ENABLE_IAM_AUTH=true

It is not very clear that this property needs to be set. It would be more clear if spring.cloud.sql.enable-iam-auth is used (as is done with database-name and instance-connection-name).

Comment From: vy

We also needed set ENABLE_IAM_AUTH=true (by means of either spring.r2dbc.properties or spring.r2dbc.jdbcUrl) to make R2DBC work against an IAM-enabled Google Cloud SQL instance. We expected this flag to be automatically set due to spring.cloud.gcp.sql.enable-iam-auth: true property.

Comment From: vy

I don't think this is the right project for this question. I have moved it to GoogleCloudPlatform/spring-cloud-gcp#1513. @dvrietschoten, would you mind closing this ticket, please?