Function upload 

pub fn upload<R: Read + Seek>(
    ctx: &RestContext,
    path: &str,
    method: &str,
    params: HashMap<String, Value>,
    reader: R,
    mime_type: &str,
    progress: Option<UploadProgressFn>,
) -> Result<Response>

Upload a file to a REST API endpoint

Arguments

• ctx - REST context for authentication
• path - API endpoint path
• method - HTTP method for initial request
• params - Parameters for initial API request
• reader - Reader for file content
• mime_type - MIME type of the file
• progress - Optional progress callback