As discussed in https://github.com/elastic/elasticsearch/pull/72867/files#r629011079, the SAML complete logout API has a camel case request parameter, `queryString`. This is an anomaly because the rest of APIs use only snake case for request parameters. This request parameter, `queryString`, should be deprecated and replaced with its snake case equivalent, `query_string`.
As discussed in https://github.com/elastic/elasticsearch/pull/72867/files#r629011079, the SAML complete logout API has a camel case request parameter,
queryString. This is an anomaly because the rest of APIs use only snake case for request parameters.This request parameter,
queryString, should be deprecated and replaced with its snake case equivalent,query_string.