On a Mac Once built, I get an SASL_SSL Invalid Value error

**Description**
When the producer is run with the SASL_SSL config I get an error that says Invalid Value

called as
./producer --config ./librdkafka.config --topic test
response
Error: KafkaError (Client config error: Invalid value "SASL_SSL" for configuration property "security.protocol" security.protocol SASL_SSL)

** Config**
bootstrap.servers=host9093
security.protocol=SASL_SSL
sasl.mechanisms=PLAIN
sasl.username="something"
sasl.password="somethingelse"

**Environment**
- GitHub branch: main
- Operating System: macos

**Build Log**
`cargo build
Compiling libc v0.2.54
Compiling cc v1.0.36
Compiling memchr v2.2.0
Compiling unicode-xid v0.1.0
Compiling pkg-config v0.3.14
Compiling version_check v0.1.5
Compiling glob v0.2.11
Compiling ucd-util v0.1.3
Compiling regex v1.1.6
Compiling utf8-ranges v1.0.2
Compiling quick-error v1.2.2
Compiling bindgen v0.42.3
Compiling proc-macro2 v0.4.29
Compiling termcolor v1.0.4
Compiling peeking_take_while v0.1.2
Compiling serde v1.0.90
Compiling syn v0.15.33
Compiling log v0.4.6
Compiling thread_local v0.3.6
Compiling proc-macro2 v0.3.5
Compiling regex-syntax v0.6.6
Compiling humantime v1.2.0
Compiling nom v4.2.3
Compiling rust-kafka-client-example v0.1.0 (/examples/clients/cloud/rust)
Compiling clang-sys v0.26.4
Compiling log v0.3.9
Compiling quote v0.5.2
Compiling libloading v0.5.0
Compiling libz-sys v1.0.25
Compiling openssl-sys v0.9.47
Compiling iovec v0.1.2
Compiling rand_jitter v0.1.4
Compiling rand_os v0.1.3
Compiling atty v0.2.11
Compiling net2 v0.2.33
Compiling num_cpus v1.10.0
Compiling which v1.0.5
Compiling num_cpus v0.2.13
Compiling aho-corasick v0.7.3
Compiling bytes v0.4.12
Compiling rand v0.6.5
Compiling clap v2.33.0
Compiling mio v0.6.19
Compiling tokio-io v0.1.12
Compiling parking_lot_core v0.4.0
Compiling tokio-threadpool v0.1.14
Compiling quote v0.6.12
Compiling mio-uds v0.6.7
Compiling tokio-codec v0.1.1
Compiling parking_lot v0.7.1
Compiling tokio-fs v0.1.6
Compiling tokio-reactor v0.1.9
Compiling env_logger v0.5.13
Compiling tokio-tcp v0.1.3
Compiling tokio-udp v0.1.3
Compiling tokio-uds v0.2.5
Compiling cexpr v0.3.5
Compiling tokio v0.1.21
Compiling serde_json v1.0.39
Compiling serde_derive v1.0.90
Compiling rdkafka-sys v1.0.0
Compiling rdkafka v0.21.0
warning: trait objects without an explicit `dyn` are deprecated
--> src/utils.rs:23:59
|
23 | pub fn get_config() -> Result<(String, ClientConfig), Box> {
| ^^^^^^^^^^^^^^^^^
|
= note: `#[warn(bare_trait_objects)]` on by default
= warning: this is accepted in the current edition (Rust 2018) but is a hard error in Rust 2021!
= note: for more information, see
help: use `dyn`
|
23 - pub fn get_config() -> Result<(String, ClientConfig), Box> {
23 + pub fn get_config() -> Result<(String, ClientConfig), Box> {
|

warning: `rust-kafka-client-example` (bin "producer") generated 1 warning
warning: `rust-kafka-client-example` (bin "consumer") generated 1 warning (1 duplicate)
Finished dev [unoptimized + debuginfo] target(s) in 23.47s
`