Added openapi generator

src/app/services/api/encoder.ts

@@ -0,0 +1,35 @@
+import { HttpParameterCodec } from '@angular/common/http';
+
+/**
+ * Custom HttpParameterCodec
+ * Workaround for https://github.com/angular/angular/issues/18261
+ */
+export class CustomHttpParameterCodec implements HttpParameterCodec {
+    encodeKey(k: string): string {
+        return encodeURIComponent(k);
+    }
+    encodeValue(v: string): string {
+        return encodeURIComponent(v);
+    }
+    decodeKey(k: string): string {
+        return decodeURIComponent(k);
+    }
+    decodeValue(v: string): string {
+        return decodeURIComponent(v);
+    }
+}
+
+export class IdentityHttpParameterCodec implements HttpParameterCodec {
+    encodeKey(k: string): string {
+        return k;
+    }
+    encodeValue(v: string): string {
+        return v;
+    }
+    decodeKey(k: string): string {
+        return k;
+    }
+    decodeValue(v: string): string {
+        return v;
+    }
+}