refactor: 💡 remove dependency on ember-get-config

addons/api/addon/adapters/application.js

@@ -2,7 +2,7 @@ import RESTAdapter from '@ember-data/adapter/rest';
 import { serializeIntoHash } from '@ember-data/adapter/-private';
 /* eslint-disable-next-line ember/no-mixins */
 import AdapterBuildURLMixin from '../mixins/adapter-build-url';
-import config from 'ember-get-config';
+import { getOwner } from '@ember/application';
 import { get } from '@ember/object';
 import { InvalidError } from '@ember-data/adapter/error';
 import { dasherize } from '@ember/string';
@@ -44,19 +44,36 @@ export default class ApplicationAdapter extends RESTAdapter.extend(
 ) {
   // =attributes
 
+  #host;
+  #namespace;
+
   /**
    * Sets host to the `api.host` string in the application's config,
    * if set.
    * @type {string}
    */
-  host = get(config, 'api.host');
+  get host() {
+    const config = getOwner(this).resolveRegistration('config:environment');
+    return this.#host || get(config, 'api.host');
+  }
+  set host(value) {
+    // Setting this value is useful for testing purposes.
+    this.#host = value;
+  }
 
   /**
    * Sets namespace to the `api.namespace` string in the application's config,
    * if set.
    * @type {string}
    */
-  namespace = get(config, 'api.namespace');
+  get namespace() {
+    const config = getOwner(this).resolveRegistration('config:environment');
+    return this.#namespace || get(config, 'api.namespace');
+  }
+  set namespace(value) {
+    // Setting this value is useful for testing purposes.
+    this.#namespace = value;
+  }
 
   // =methods
 

addons/api/mirage/config.js

@@ -8,7 +8,7 @@ import makeBooleanFilter from './helpers/bexpr-filter';
 const isTesting = config.environment === 'test';
 
 export default function () {
-  initializeMockIPC(this);
+  initializeMockIPC(this, config);
 
   // make this `http://localhost:8080`, for example, if your API is on a different server
   // this.urlPrefix = '';

addons/api/mirage/scenarios/ipc.js

@@ -1,9 +1,8 @@
-import config from 'ember-get-config';
 import { datatype } from 'faker';
 
-const isTesting = config.environment === 'test';
+export default function initializeMockIPC(server, config) {
+  const isTesting = config.environment === 'test';
 
-export default function initializeMockIPC(server) {
   /**
    * We strive to make this application runnable in a regular web browser, since
    * it is a convenient environment for development and testing.  But only an

addons/api/package.json

@@ -51,7 +51,6 @@
     "ember-copy": "^2.0.1",
     "ember-disable-prototype-extensions": "^1.1.3",
     "ember-export-application-global": "^2.0.1",
-    "ember-get-config": "^0.3.0",
     "ember-load-initializers": "^2.1.2",
     "ember-maybe-import-regenerator": "^1.0.0",
     "ember-page-title": "^6.2.2",